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A train 800 meters long is running at a speed of 78 km/hr . If it crosses a tunnel in 1 minute, then the length of the tunnel ( in meters ) is :

A train 800 meters long is running at a speed of 78 km/hr . If it crosses a tunnel in 1 minute, then the length of the tunnel ( in meters ) is : Correct Answer 500

78 km/hr = (78 × 1000) / 60 m/min = 1300 m/min In 1 minute it travels 1300 m/min 1300 = 800 + length of tunnel length of tunnel = 1300 - 800 = 500 merer.

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